limx->0 f(ax)/x=A 求limx->0 x/f(bx)=?

limx->0 f(ax)/x=A 求limx->0 x/f(bx)=? 设limx→∞f'(x)=k求limx→∞[f(x a)-f(x)] 设f(x)=|x|/x,求limx→0-f(x)及limx→0+f(x),并判断limx→0f(x)是否存在 1.设f(x)是三次函数,且limx→-1 f(x)/(x+1)=6,limx→-2 f(x)/(x-2)= -3/2,求limx→3 f(x)/(x-3)的值.2.已知limx→1 (ax^2+bx+1)/(x-1)=3,求limx→∞ ( b^n+a^(n-1) )/( a^n+b^(n-1) )需要全过程, limx→0(f(x)/x^2)=5 求limx→0f(x)与limx→0(f(x)/x) 函数f(x,y)在y>x＞0时连续可导已知对于任意z>y>x,有f(x,y)*f(y,z)=f(x,z)并且对于任意a>0,有f(x,y)=f(ax,ay)已知f(1,1)=1,limx->0 f(x,1)=0求f(x,y) limx趋于0x/f（3x）=2,求limx趋于0f（2x）/x 已知limx→∞[(x^2+1)/(x+1)-(ax+b)]=0,求常数a,b的值 若limx→∞[(2x^2+3)/(x+1)-ax+b]=0,求a,b的值 若limx→∞[（x²+1）/(x+1)-ax-b]=0,求a、b limx趋近于∞〔（x^2+1)/（x+1)-ax-b〕=0,求常数a,b limx→+∞[3x-根号下（ax^2-x+1]=2,求a 已知limx^2+ax+b/x-1=3(x趋向于1),求a, limx趋向无穷[(x^2+1)/(x+1)]-(ax+b)=1 求a,b 设f(x)在x=0处连续,且limx->0f(x)-1/x=a(a为常数),求f(0),f'(0) limx→+∞[5x-根号下(ax^2+bx+1)]=0,求a和b limx→+∞[5x-根号下(ax^2+bx+1)]=0,求a和b 设f(x)是多项式,且limx->∞ (f(x)-2x^3)/x^2=2,且limx->0 f(x)/x=3,求f(x).